Method of making rubber nasal masks



Oct. 6, 1942-? c. L. BEAL METHOD OF MAKING RUBBER NASALMASKS Original Filed April. 6,1940

Patented Oct. 6, 1942 METHOD OF MAKING'RUBBER NASAL MASKS Carl L. Beal, Cuyahoga Falls, Ohio, assignor to American Anode, Inc., Akron, Ohio, a. corporation 01' Delaware Original application April 6, 1940, Serial No.

328,329. Divided and this application March.

I 29, 1941, Serial No. 385,797

4 Claims.

This invention relates to an improved deposi-' tion form and method for use in making rubber nasal masks of the type used, for example, by aviators for high altitude flying.

This application is a division of my copending application Serial No. 328,329, filed April 6, 1940.

This invention comprises a deposition form with certain novel structural features incorporated therein so that an improved nasal mask may be made efliciently, cheaply, and with a minimum of time. The mask produced is of onepiece integral construction.

Generally, the improved form which is the subject of this invention comprises a bulbous portion, two rod-like arms extending from spaced apart pointson the bulbous portion and mergingto form a ring-like structure, and a stem portion on the ring-like structure opposite to and projecting in a direction generally awayfrom the bulbous portion. The form is coated with rubber by any of the usual methods such as by depositing rubber from an aqueous dispersion of rubber by the use of a coagulant solution such as any of those disclosed in U. '8. Patent No. 1,996,090 granted to Edward A. Willson. This invention can best be understood by ref- 1 erence to the accompanying drawing showing both the construction of the form and the prin-- cipal steps in a preferred method of making a rubber nasal mask, as well as the rubber article so produced.

and projecting generally away from the bulbous portion I I. A fin-like portion I5 is located on the bulbous portion I I and projects outwardly in a direction opposite the stem portion I4. The bulbous. portion II and the fin-like portion I5 are provided with a backing portion I6 which serves to produce a fiat backand is arranged so as to leave open spaces between the backing portion I6 and each of the rod-like arms I2, I2 for a substantial distance along the rod-like arms as indicated at 25, 25. These two open spaces are joined by a groove IT in the bulbous portion I I between the rod-like arms I2, I2 with the groove having an angular shoulder formed by the backing portion I6. The deposition form I0 consists of two elements separably joined, as with dowel pins, at two points I8, I9 on the ring-like structure I3 to give a unitary structure. These points lie in linear relationship with one of the points I8, located near the stem portion I4 of the form and with the other point I9 located near the bulbous portion II of the form.

The deposition form is mounted on a support 20 extending from the backing portion I6 for Fig. 1 is anelevation of the deposition form of this invention mounted on a support and immersed in a body of latex.

Fig. 2 is an elevation of the rubber coated form with a portion of the rubber broken away for clarity of illustration.

Fig. 3 is an elevation illustrating removal of the form from the rubber deposit.

Fig. 4 is an elevation in profile of the nasal mask.

Fig. 5 is an elevation showing the rear view of the nasal mask.

Fig. 6 is a cross-sectional elevation of the mask taken along line 6-6 of Fig. 5.

Fig. 7 is a cross-sectional elevation of the deposition form taken along line 'I-'I of Fig. 1.

A deposition form III embodying the present invention comprises a bulbous portion II, and two rod-like arms I2, I2 of generally semi-circular cross section projecting from spaced apart points on the bulbous portion II. These arms merge to form a ring-like structure I3 lying in a concave plane. A stem portion I4 is provided the clipping operation and is preferably mounted with the stem portion I4 up so as to lessen any danger of'the form coming apart at the two joints I8, I9. The deposition form is coated with rubber, as by immersion in latex (Fig. l) and the rubber is dried and vulcanized. The rubber is cut around the edge 2I of the backing portion I6 and this. section of the rubber is removed. The form is then separated at the two points I8, I 9 and the bulbous portion II with its attached portion of the ring-like structure I3 is portion is cut off and the portion of the mask like, with the preferred material being-alumion this ring-like structure I3 located opposite to num.

' Although this invention has been described with particular reference to a preferred formand to the resulting nasal mask produced therewith it is understood that the invention is not limited to this preferred embodiment but shall be unlimited within the spirit and scope of the appended claims.

I claim:

1. The method of making a rubber nasal mask comprising forming a hollow one-piece unitary rubber deposit comprising a bulbous portion with two tube-like portions projecting from spaced apart points on the bulbous portion by depositing rubber from a liquid rubber composition on a deposition form of the required shape, removing from the bulbous portion a generally triangular portion lying in a plane generally parallel to the plane of the projecting tube-like arms, and removing at least a portion of the deposition form through the resulting opening in the rubber deposit.

2. The method of making a rubber nasal mask tion lying in a plane generally parallel to the plane or the projecting tube-like arms, and feathering a substantial part of the edge so formed by the removal of the triangular portion.

3. The method of making a rubber nasal mask comprising forming, a hollow one-piece unitary rubber deposit comprising a bulbous portion with two tube-like portions projecting from spaced apart points on the bulbous portion and merging to form a ring-like structure, removing a generally triangular portion at the back of the bulbous portion, and feathering a substantial part of the edge so formed by the removal of the triangular portion.

4. The method of making a rubber nasal mask comprising forming a hollow one-piece unitary rubber deposit comprising a bulbous portion with two tube-like portions projecting from spaced apart points on the bulbous portion and merging to form a ring-like structure, removing a generally triangular portion at the back of the bulbous portion, and feathering the entire edge so formed by the removal of the triangular portion.

CARL L. BEAL. 

